.img-box {
  position: relative;
  width: 40px;
  height: 40px;
  line-height: 40px;
  cursor: pointer;

  .popover-img {
    width: 100%;
    height: 100%;
    border-radius: 2px;
    vertical-align: middle;
  }

  i {
    margin: 0 !important;
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    // display: none !important;
    z-index: 1;
    color: #ffffff;
    font-size: 20px;
  }

  &:hover {
    .mask {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border-radius: 2px;
      background: rgba(0, 0, 0, .3);
    }

    i {
      display: block !important;
    }
  }
}

.big-img {
  border-radius: 2px;
  width: 400px;
}